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Radiant|Natural|GIA

0.51ct G SI2 Radiant Natural Diamond

ID • G/SI2 • GIA 2556750688

Certificate GIA 2556750688

Diamond specifications and retailer prices

From $448 USD
As of October 30, 2026
Save $1,293 USD (74%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,741 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556750688. Listed at 17 retailers as of October 30, 2026, with prices from $448 to $1,741, a $1,293 spread on the same certified stone. NZ Jewellers lists it at $1,741. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
G
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle53.9°
OriginNatural
Grading LabGIA
CertificateGIA 2556750688
Dimensions5.96 × 3.87 × 2.61 mm
L/W Ratio1.54
Girdle conditionPolished
Culet sizeNone
Top View
5.96 mm3.87 mm0.51 ctG / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556750688
Side View
Table 66.0%Crown 36°Girdle: MED-STKPavilion 53.9°Culet: NoneDepth 67.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,741 USD|Low: $395 USD|High: $1,799 USD|Avg: $679 USD|-3.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 14$448 USD
Retailer 5$464 USD
Retailer 9$490 USD
Retailer 3$503 USD
Retailer 8$512 USD
Retailer 6$542 USD
Retailer 7$542 USD
Retailer 17$580 USD
Retailer 12$585 USD
Retailer 4$609 USD
Retailer 2$663 USD
Retailer 10$695 USD
Retailer 15$696 USD
Retailer 16$706 USD
Retailer 13$746 USD
Retailer 11$1,283 USD
NZ Jewellers$1,741 USD

36 data points across 17 retailers

17 retailers$448 USD to $1,741 USD

A
Cheapest Retailer
-
$448 USD
A
Retailer 2
-
$464 USD
View
Final sale: no returns
Retailer 3
-
$490 USD
View
Price last confirmed 11 days ago
A
Retailer 4
-
$503 USD
View
A
Retailer 5
-
$512 USD
HK$4,000 HKD
View
A
Retailer 6
-
$542 USD
View
A
Retailer 7
-
$542 USD
View
A
Retailer 8
-
$580 USD
View
A
Retailer 9
-
$585 USD
View
A
Retailer 10
-
$609 USD
View
A
Retailer 11
-
$663 USD
£522 GBP
View
A
Retailer 12
-
$695 USD
£548 GBP
View
A
Retailer 13
-
$696 USD
£548 GBP
View
A
Retailer 14
-
$706 USD
View
B+
Retailer 15
-
$746 USD
€710 EUR
View
B
Retailer 16
-
$1,283 USD
£1,010 GBP
View
Most Expensive
B
NZ Jewellers
e6671163-bf29-4252-8837-769f134d2016 · Oct 30
$1,741 USD
View
16 more retailers have this diamond
Prices start from $448 USDSave up to $1,293 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Radiant
$448 USD